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Stainless Steel Pipes | Seamless & Welded 904L/2205 Alloy Solutions 💎

$1,400.00 SGD

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Quantity 1 - 19 tons 20 - 99 tons 100 - 999 tons >= 1000 tons

Stainless Steel Pipes | Seamless & Welded 904L/2205 Alloy Solutions

Property	Alloy 904L	Duplex 2205
Material Grade	UNS N08904 / EN 1.4539	UNS S32205 / EN 1.4462
Chemical Composition	19-23% Cr, 23-28% Ni, 4-5% Mo, 1-2% Cu	22-23% Cr, 4.5-6.5% Ni, 3-3.5% Mo, 0.14-0.2% N
Tensile Strength	490–690 MPa	620–900 MPa
Yield Strength	220 MPa	450 MPa
Hardness (Rockwell)	70–90 HRB	290 HBW
Temperature Resistance	Up to 450°C (continuous)	Up to 300°C (continuous)
Corrosion Resistance	Exceptional in sulfuric, acetic, and chloride environments	Superior resistance to chloride stress corrosion and pitting
Standard Compliance	ASTM A312, B677, EN 1.4539	ASTM A790, A928, EN 1.4462
Dimensions (OD)	6–2500 mm	6–2500 mm
Wall Thickness	0.5–150 mm	0.5–150 mm
Surface Finish	Annealed, Pickled, Polished	Annealed, Shot Blasted
Applications	Chemical reactors, heat exchangers, marine systems	Offshore platforms, oil/gas pipelines, desalination plants

High-Performance Alloys
- Alloy 904L: A super-austenitic stainless steel with copper addition, ideal for stainless steel pipe connectors in sulfuric acid environments. Resists crevice corrosion and stress cracking in chloride-rich settings, making it perfect for marine and pharmaceutical industries.
- Duplex 2205: Combines austenitic and ferritic structures, offering double the yield strength of standard grades. Ideal for 2 inch stainless steel pipe systems in high-pressure oil/gas applications.
Mechanical Strength
- Tensile Strength: Alloy 904L maintains stability in acidic media, while Duplex 2205 excels in mechanical stress due to nitrogen-enhanced toughness.
- Bend Strength: Both grades support seamless welding and cold forming, critical for custom stainless steel pipe suppliers offering tailored solutions.
Corrosion Resistance
- 904L: Resists reducing acids (e.g., sulfuric, phosphoric) and seawater due to high molybdenum and nickel content.
- 2205: Immune to chloride-induced stress corrosion cracking (SCC), ideal for offshore rigs and desalination plants.

The weight of stainless steel pipes is calculated using:
$Weight (kg/m) = \frac{( O D - W T ) \times W T \times 0.02466}{1000}$
Where:

Example: A 2 inch stainless steel pipe (50.8 mm OD) with 5 mm wall thickness weighs 5.58 kg/m.

Laser Etching: ASTM/EN standards, heat number, and alloy grade (e.g., "904L" or "2205").
Color Coding: Optional bands for industrial inventory management.

Despite their corrosion-resistant properties, rust can occur due to:

Chloride Exposure: Coastal or industrial environments degrade passive oxide layers, especially in Alloy 904L without post-weld cleaning.
Intergranular Corrosion: Improper welding of Duplex 2205 without nitrogen stabilization leads to chromium carbide precipitation.
Surface Contamination: Iron particles or grease disrupt the protective chromium oxide layer.
Low-Quality Alloys: Substandard nickel/molybdenum ratios reduce corrosion resistance.

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